clang/test/CodeGen/asan-globals-alias.cpp

   1 // RUN: %clang_cc1 -triple x86_64-linux -fsanitize=address -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,ASAN
   2 // RUN: %clang_cc1 -triple x86_64-linux -O2 -fsanitize=address -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,ASAN
   3 // RUN: %clang_cc1 -triple x86_64-linux -fsanitize=kernel-address -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,KASAN
   4 // RUN: %clang_cc1 -triple x86_64-linux -O2 -fsanitize=kernel-address -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,KASAN
   5 //
   6 // Not all platforms support aliases - test for Linux only.
   7
   8 int global; // generate ctor for at least 1 global
   9 int aliased_global; // KASAN ignored
  10 extern int __attribute__((alias("aliased_global"))) __global_alias;
  11
  12 // Recursive alias:
  13 int aliased_global_2; // KASAN ignored
  14 extern int __attribute__((alias("aliased_global_2"))) global_alias_2;
  15 extern int __attribute__((alias("global_alias_2"))) __global_alias_2_alias;
  16
  17 // Potential indirect alias:
  18 struct input_device_id {
  19   unsigned long keybit[24];
  20   unsigned long driver_info;
  21 };
  22 struct input_device_id joydev_ids[] = { { {1}, 1234 } }; // KASAN ignored
  23 extern struct input_device_id __attribute__((alias("joydev_ids"))) __mod_joydev_ids_device_table;
  24
  25 // ASAN: @aliased_global{{.*}} global { i32, [28 x i8] }{{.*}}, align 32
  26 // ASAN: @aliased_global_2{{.*}} global { i32, [28 x i8] }{{.*}}, align 32
  27 // ASAN: @joydev_ids{{.*}} global { {{.*}}[56 x i8] zeroinitializer }, align 32
  28 // KASAN: @aliased_global{{.*}} global i32
  29 // KASAN: @aliased_global_2{{.*}} global i32
  30 // KASAN: @joydev_ids{{.*}} global [1 x {{.*}}i64 1234 }], align 16
  31
  32 // Check the aliases exist:
  33 // CHECK: @__global_alias ={{.*}} alias
  34 // CHECK: @global_alias_2 ={{.*}} alias
  35 // CHECK: @__global_alias_2_alias ={{.*}} alias
  36 // CHECK: @__mod_joydev_ids_device_table ={{.*}} alias
  37
  38 // CHECK-LABEL: define internal void @asan.module_ctor
  39 // ASAN: call void @__asan_register_globals({{.*}}, i{{32|64}} 4)
  40 // KASAN: call void @__asan_register_globals({{.*}}, i{{32|64}} 1)
  41 // CHECK-NEXT: ret void
  42
  43 // CHECK-LABEL: define internal void @asan.module_dtor
  44 // CHECK-NEXT: call void @__asan_unregister_globals
  45 // CHECK-NEXT: ret void